<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 主体区域 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom',i1 === 0? 'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 二级权限 -->
                <el-row :class="[i2 === 0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 展示三级权限 -->
                  <el-col :span="18">
                    <el-tag type="warning" v-for="item3 in item2.children"
                      :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">操作</el-button>
            <el-button size="mini" type="primary" icon="el-icon-settingn" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%" @close="setRightsDialogClosed">
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id"
      default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>

  </div>
</template>

<script>
export default{
  data() {
    return {
      rolelist: [],
      setRightDialogVisible: false,
      rightsList: [],
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id数值组
      defKeys:[],
      roleId: ''
    }
  },
  created(){
    this.getRolelist()
  },
  methods:{
    //分配权限功能
    async allotRights(){
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      //将节点数组转为字符串，并以逗号分割
      console.log("99999999")
      console.log(keys)
      const idStr = keys.join(',');
      console.log(idStr)
      const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})

      if(res.meta.status != 200) return this.$message.error("更新权限列表失败!")
      this.$message.success("更新权限列表成功!")
      this.getRolelist()
      this.setRightDialogVisible = false
    },
    setRightsDialogClosed(){
      this.defKeys = []
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到defalutKeys中
    getLeafKeys(node,arr){
      // 如果node不包含childre属性，则说明就是三级节点
      if (!node.children){
        return arr.push(node.id)
      }
      // 如果不是三级节点，则递归
      node.children.forEach(item => {
        this.getLeafKeys(item,arr)
      })

    },
    // 展示分配权限的对话框
    async showSetRightDialog(row){
      this.roleId = row.id
      const {data:res} = await this.$http.get('rights/tree')
      if(res.meta.status != 200) return this.$message.error("获取权限数据失败!")

      this.rightsList = res.data
      console.log('3333333333')
      console.log(this.rightsList)
      // 递归获取三级节点的id
      this.getLeafKeys(row,this.defKeys)
      this.setRightDialogVisible = true
    },
    // 标签删除方法
    async removeRightById(role,rightId){
      this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(async () => {
        const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if (res.meta.status != 200) return this.$message.error("删除权限失败!")
        role.children = res.data
        this.$message({
          type: 'success',
          message: '删除成功!'
        });
      }).catch(() => {
        this.$message({
          type: 'info',
          message: '已取消删除'
        });
      });
    },
    getRolelist(){
      this.$http.get('roles')
      .then(res => {
        console.log("22222222")
        console.log(res)
        if (res.data.meta.status != 200) return this.$message.error("获取角色列表失败!")
        this.rolelist = res.data.data
      })
    }
  }

}
</script>

<style scoped>
.vcenter{
  display: flex;
  align-items: center;
}
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;
}
</style>
